USER`S MANUAL DMR-6780
Contents
1. 60 C Max 80 up to 87 F 31 C decreasing linearly to 50 at 104 F 40 C lt 80 7000ft 2000meters maximum 0 753lb 342g includes holster spe Size Safety Approvals 7 36 x 3 2 x 2 0 187 x 81 x 50mm includes holster This meter is UL and CUL approved and con forms to IEC61010 1 for Overvoltage Category CAT IV 600V and CAT III 1000V Accuracy Function Resolution 600mV 0 1mV 6V 0 001V DC Voltage 60V 0 01V 0 09 reading 2 digits 0 1V 1V 50 to 60Hz 40Hz to 1KHz 6V 0 001V 60V 0 01V 1 0 reading 2 0 reading AC Volt Suolo 600V 0 1V 3 dgts 3 dgts 1000V 1V All AC voltage ranges are specified from 5 of range to 100 of range 600A 0 1uA 6000A 1uA 60mA 0 01mA f a DC Current 600mA 0 1mA apace reading 3idigits 6A 0 001A 10A 0 01A 20A 30 sec max with reduced accuracy 40Hz to 1kHz 1 5 reading 3 digits 600A 0 1pA 6000A 1uA 60mA 0 01mA AC Current 600mA 0 1mA 6A 0 001A 10A 0 01A 20A 30 sec max with reduced accuracy All AC voltage ranges are specified from 5 of range to 100 of range Note Accuracy is stated at 65 F to 83 F 18 C to 28 C and less than 75 RH 8 Function Range Resolution Accuracy 6002. 0 0 10 6kQ 0 001kQ Resistance 60kQ 0 01kO 0 3 reading 4 digits 600kQ 0 1kQ 6MQ 0 001MQ 60MQ 0 01MQ 0 3 reading 20 digits 60nF 0 01nF 600nF 0 1nF 6uF 0 001pF 3 5 reading 4 digits Capacitance 60UF 0 01uF 600UF 0 1uF 1000uF 1uF 5 reading 5 digits 9 999Hz 0 001Hz 99 99Hz 0 01Hz 999 9Hz 0 1Hz a ea 0 1 reading 1 digits Frequency 999 9kHz 0 1kHz 9 999MHz 0 001MHz 40MHz 01MHz Sensitivity 0 8V rms min 20 to 80 duty cycle and lt 100kHz 5Vrms min 20 to 80 duty cycle and gt 100kHz Frequency 10 00 400Hz 0 01Hz 0 5 reading electrical Sensitivity 15Vrms Duty Cycle 0 1 1 2 reading 2 digits Pulse width 100us to 100ms Frequency 5Hz to 150kHz Temp 50 to 1382 F 1 F 3 0 reading 5 C 9 F digits type K 45 to 750 C 1 C probe accuracy not included Note Accuracy specifications consist of two elements reading This is the accuracy of the measurement circuit digits This is the accuracy of the analog to digital converter Operating Instructions WARNING Risk of electrocution High voltage circuits both AC and DC are very dangerous and should be measured with great care 1 ALWAYS turn the function switch to OFF position when the meter is not in use 2 If OL appears in the display during a measurement the value exceeds the range you have selected Change to a higher range DC Voltage Measurements CAUTION Do not me
3. CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY lis equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY II Equipmentof OVERVOLTAGE CATEGORY Ilis energy consuming equip ment to be supplied from the fixed installation Note Examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY Ill is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note Examples include electricity meters and primary over current protec tion equipment SAFETY INFORMATION Caution and proper guidelines must be followed for personal and product safety Read this instruction manual carefully and completely before using the meter Lack of caution or poor safety practices can result in serious injury or death Always start with power off Set the function switch to the correct setting before making any measurements and do not change position of the func tion switch during measurements Do not use the meter if the meter or test leads look damaged or if there is doubt that
4. Press the HZ button to indicate Hz Read the frequency in the display Press the HZ button again to indicate Read the of duty cycle in the display 11 DC Current Measurements CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 6000pA DC set the function switch to the yellow pA position and insert the red test lead banana plug into the HA MA jack 3 For current measurements up to 600mA DC set the function switch to the yellow mA position and insert the red test lead banana plug into the pA mA jack 4 For current measurements up to 10A DC set the func tion switch to the yellow 10A HZ position and insert the red test lead banana plug into the 10A jack Press the MODE button to indicate DC on the display Remove power from the circuit under test then open up the circuit at the point where you wish to measure cur rent 7 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of the circuit ieee Apply power to the circuit Read the current in the display 2s AC Current Frequency Duty Cycle Measurements CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause dam
5. USER S MANUAL Multimeter True RMS DMR 6780 CIRCUIT TEST ELECTRONICS www circuittest com Introduction This meter measuresAC DC Voltage AC DC Current Resistance Capacitance Frequency electrical amp electronic Diode Test and Continuity plus Thermo couple Temperature Itfeatures a waterproof rugged design for heavy duty use Proper use and care of this meter will provide many years of reliable service Safety A CAUTION MAX fh 000V AN O This symbol adjacent to another symbol terminal or operating device indicates that the operator must refer to an explana tion in the Operating Instructions to avoid personal injury or damage to the meter This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury This CAUTION symbol indicates a potentially hazardous situ ation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds in this case 1000 VAC or VDC This symbol adjacent to one or more terminals identifies them as being associated with ranges that may be subjected to particularly hazardous voltages For maximum safety the meter and test leads should not be handled when these terminals are energized Double Insulation PER IEC1010 OVERVOLTAGE INSTALLATION
6. age to the meter and or the test leads Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 6000 A AC set the function switch to the yellow pA position and insert the red test lead banana plug into the HA MA jack 3 For current measurements up to 600mA AC set the function switch to the yellow mA position and insert the red test lead banana plug into the pA mA jack 4 For current measurements up to 10A AC set the function switch to the yellow 10A HZ position and insert the red test lead banana plug into the 10A jack 5 Press the MODE button to indicate AC on the display 6 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current 7 Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip to the hot side of the circuit 8 Apply power to the circuit 9 Read the current in the display 10 Press the Hz button to indicate Hz 11 Read the frequency in the display 12 Press the Hz button again to indicate 13 Read the duty cycle in the display 14 Press the Hz button to return to current measurement 18 Resistance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the batteries and unplug the l
7. ally indicate 0 400 to 0 700V Reverse voltage will indicate OL Shorted devices will indicate near OV and an open device will indicate OL in both polarities Temperature Measurements 5 Set the function switch to C F position Insert the Temperature Probe into the input jacks making sure to observe the correct polarity Press the MODE button to indicate F or C Touch the Temperature Probe head to the part whose temperature you wish to measure Keep the probe touching the part under test until the reading stabilizes about 30 seconds Read the temperature in the display NOTE The temperature probe is fitted with a type K mini connector A mini connector to banana connector adaptor is supplied for connection to the input banana jacks 15 Capacitance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the Q gt e position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Press the MODE button to indicate nF on the display Touch the test leads to the capacitor to be tested 5 The test may take up to 3 minutes or more for large capacitors to charge Wait until the readings settle before endin
8. ange SIBA 50 199 06 7 Replace and secure the rear cover battery and battery cover WARNING To avoid electric shock do not operate your meter until the fuse door is in place and fastened securely 20 Limited Warranty Circuit Test Electronics warrants to the original purchaser that this product be free of defect in material or workmanship for a period of 2 years from the date of purchase Any product which has been subjected to misuse or accidental damage is excluded from the warranty Except as stated above Circuit Test Electronics makes no promises or warranties either expressed or implied including war ranties of merchantability or the fitness for any particular purpose M DMR 6780 07R13 Da
9. asure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter Set the function switch to the V position 2 Insert the black test lead banana plug into the nega tive COM jack Insert the red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of the circuit 4 Read the voltage in the display 10 AC Voltage Frequency Duty Cycle Measurements PUN OR WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present CAUTION Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter Set the function switch to the V Hz position Insert the black test lead banana plug into the negative COM jack In sert red test lead banana plug into the positive V jack Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip to the hot side of the circuit Read the voltage in the display
10. ertz frequency V Volts Percent duty ratio AC REL Relative AC Alternating current AUTO Autoranging DC Direct current HOLD Display hold F Degrees Fahrenheit c Degrees Centigrade MAX Maximum MIN Minimum Specifications Enclosure Shock Drop Test Diode Test Continuity Check Temperature Sensor Input Impedance AC Response ACV Bandwidth Crest Factor Display Over range indication Auto Power Off Polarity Measurement Rate Low Battery Indication Battery Fuses Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Weight Double molded waterproof 6 5 feet 2 meters Test current of 0 9mA maximum open circuit voltage 2 8V DC typical Audible signal will sound if the resistance is less than 100Q approx test current lt 0 35mA Requires type K thermocouple gt 10MQ True RMS 40Hz to 1000Hz lt 3 at full scale up to 500V decreasing linearly to lt 1 5 at 1000V 6 000 count backlit liquid crystal with bargraph OL is displayed 15 minutes approximately with disable feature Automatic no indication for positive Minus sign for negative 2 times per second nominal LI is displayed if battery voltage drops below operating voltage One 9 volt NEDA 1604 battery mA WA ranges 0 8A 1000V ceramic fast blow 6 32 x 32mm A range 10A 1000V ceramic fast blow 10 x 38mm 41 F to 104 F 5 C to 40 C 4 F to 140 F 20 C to
11. g the test 6 Read the capacitance value in the display Frequency Duty Cycle Measurements Electronic Set the function switch to the Hz position Press the Hz button to indicate Hz in the display Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack Touch the test probe tips to the circuit under test Read the frequency on the display Press the Hz button again to indicate on the bs display 7 Read the of duty cycle on the display 16 Autoranging Manual Range Selection When the meter is first turned on it automatically goes into Autoranging This automatically selects the best range for the measurements being made and is generally the best mode for most measurements For measurement situations requiring that a range be manually selected perform the following 3 Press the RANGE key The AUTO display indicator will turn off Press the RANGE key to step through the available ranges until you select the range you want To exit Manual Ranging press and hold RANGE key for 2 seconds NOTE Manual ranging does not apply for Capacitance and Frequency functions MAX MIN NOTE When using the MAX MIN function in Autoranging mode the meter will lock into the range that is displayed on the LCD when MAX MIN is activated If a MAX Min reading exceeds that range an OL will be displayed Se
12. ine cords Set the function switch to the Q e position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Q jack 3 Press the MODE button to indicate Q on the display Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 5 Read the resistance in the display Continuity Check WARNING To avoid electric shock never measure continuity on circuits or wires that have voltage on them Set the function switch to the Q e position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Q jack 3 Press the MODE button to indicate and Q on the display GA 4 Touch the test probe tips to the circuit or wire you wish j to check t 5 If the resistance is less than approximately 350 the audible signal will sound If the circuit is open the display will indicate OL 14 Diode Test Set the function switch to the Q position Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack Press the MODE button to indicate gt and V on the display Touch the test probes to the diode under test Forward voltage will typic
13. lect the desired range BEFORE entering MAX MIN mode Press the MAX MIN key to activate the MAX MIN recording mode The display icon MAX will appear The meter will display and hold the maximum reading and will update only when a new max occurs Press the MAX MIN key again and the display icon MIN will appear The meter will display and hold the minimum reading and will update only when a new min occurs To exit MAX MIN mode press and hold the MAX MIN key for 2 seconds Ta RELATIVE MODE The relative measurement feature allows you to make measurements relative to a stored reference value A reference voltage current etc can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value Perform the measurement as described in the operating instructions 2 Press the REL button to store the reading in the display and the REL indicator will appear on the display 3 The display will now indicate the difference between the stored value and the measured value 4 Press the REL button to exit the relative mode NOTE The Relative function does not operate in the Frequency function DISPLAY BACKLIGHT Press the HOLD key for gt 1 second to turn on or off the display backlight func tion The backlight will automatically turn off after 10 seconds HOLD The hold function freezes the reading in the display Press the HOLD key m
14. ng with high voltages DO NOT measure voltage if the voltage on the COM input jack ex ceeds 600V above earth ground 4 NEVER connect the meter leads across a voltage source while the function switch is in the current resistance or diode mode Doing so can damage the meter 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests 6 ALWAYS turn off the power and disconnect the test leads before open ing the covers to replace the fuse or batteries 7 NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely 8 If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 5 Controls and Jacks 6 000 count LCD display RANGE button er Hz and button i Di Mode button 2 Function switch 3 40 UA MA and 10A input jacks COM input jack Positive input jack HOLD and Backlight button 0 RELATIVE button 11 MAX MIN button 6 Note Tilt stand and battery compartment are on rear of unit Symbols and Annunciators OO e Gip O I Ss o Li off AUTO MAX MIN HOLD REL dt D ontinuity gt Diode test ac DU I 1 Fe Battery status 0 I LI I T I C n nano 10 capacitance u micro 10 amps cap E INA m milli 10 volts amps A Amps k kilo 105 ohms F Farads capacitance M mega 10 ohms Q Ohms Hz H
15. omentarily to activate or to exit the HOLD function MODE To select Resistance Diode Continuity Capacitance F C or AC and DC Volts and Current AUTO POWER OFF The auto off feature will turn the meter off after approximate 15 minutes of inactivity To disable the auto power off feature hold down the MODE button and turn the meter on LOW BATTERY INDICATION The LI icon will be indicated in the display when the battery voltage becomes low Replace the battery when this appears 18 Maintenance WARNING To avoid electric shock disconnectthe test leads from any source of voltage before removing the back cover or the battery or fuse covers WARNING To avoid electric shock do not operate your meter until the battery and fuse covers are in place and fastened securely This multimeter is designed to provide years of dependable service if the following care instructions are performed 1 KEEP THE METER DRY If it gets wet wipe it off 2 USE AND STORE THE METER IN NORMAL TEMPERATURES Tem perature extremes can shorten the life of the electronic parts and distort or melt plastic parts 3 HANDLE THE METER GENTLY AND CAREFULLY Dropping it can damage the electronic parts or the case 4 KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents 5 USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE Remove old or weak batteries so they do n
16. ot leak and damage the unit 6 IF THE METER IS TO BE STORED FOR ALONG PERIOD OF TIME the batteries should be removed to prevent damage to the unit Battery Installation WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery cover Turn power off and disconnect the test leads from the meter 2 Open the rear battery cover by removing two screws B using a Phillips head screwdriver Insert the battery into battery holder observing the correct polarity Put the battery cover back in place Secure with the screws 19 WARNING To avoid electric shock do not operate the meter until the bat tery cover is in place and fastened securely NOTE If your meter does not work properly check the fuses and batteries to make sure that they are still good and that they are properly inserted Replacing the Fuses WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the fuse cover 1 2 3 4 Di 6 Disconnect the test leads from the meter Remove the protective rubber holster Remove the battery cover two B screws and the battery Remove the six A screws securing the rear cover Gently remove the old fuse and install the new fuse into the holder Always use a fuse of the proper size and value 0 8A 1000V fast blow for the 600mA range SIBA 70 172 40 10A 1000V fast blow for the 10A r
17. the meter is not operating properly When using the test probes always keep fingers behind the finger guards Never touch the exposed probe tip Always consider circuits to be energized Never assume any equipment to be de energized Use caution when working above 35VDC or 25VAC RMS as these volt ages pose a shock hazard Never connect unit to AC or DC powered circuits when the function switch is set to resistance diode check or continuity ranges Always disconnect the power when performing resistance or diode tests Always turn off the power to the circuit under test before unsoldering or breaking the circuits Small amount of current can be dangerous Disconnect test leads before removing the batteries or the fuse Do not operate the unit unless the case is completely closed SAFETY INSTRUCTIONS This meter has been designed for safe use but must be operated with cau tion The rules listed below must be carefully followed for safe operation 1 NEVER apply voltage or current to the meter that exceeds the specified maximum Input Limits Function Maximum Input V DC or VAC 1000VDC AC rms mA AC DC 800mA 1000V fast acting fuse AACIDC 10A 1000V fast acting fuse 20A for 30 seconds max every 15 minutes Frequency Resistance Capacitance Diode Test Continuity Temperature 1000VDC AC rms Surge Protection 8kV peak per IEC 61010 1000VDC AC rms USE EXTREME CAUTION when worki
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